Portable high-performance roughness measuring device with 14 different roughness parameters

SRTPro

The portable roughness tester SRTPro is a high-precision measuring device that impresses with its wide measuring range and excellent performance. It is ideally suited for measuring roughness on metallic and non-metallic surfaces. Particularly noteworthy is the side-mounted test stylus of the SRTPro, which enables precise measurements on inner surfaces of bores and in grooves. This innovative feature expands the range of applications and ensures the highest accuracy even in hard-to-reach areas.

Properties

Compact and lightweight design with electromechanical integration
DSP chip for control and data processing: High speed with low power consumption
Automatic range switching and real-time display
Graphical representation of measurements for on-site verification with parameter and waveform display on the screen
Use of TYPE-C and Mini-USB interfaces
Display direction can be changed for easy operation with left or right hand
Adjustable upper and lower limit alarm
Printing function for single or multiple data sets
Compatible with various standards
Battery indicator shows remaining battery capacity on the display
Continuous operation time of up to 20 hours
Large data storage for 100 raw data and measured profiles
Real-time clock for easy data recording and storage
Automatic sleep mode, automatic shutdown, and energy-saving functions
Reliable circuit and software design prevents motor stalling
Available languages: German/English
Printing option for all or custom parameters
High-precision glass calibration pattern with long lifespan and scratch-resistant surface
Optional accessories: Curved sensor, sensor for very small holes, measuring stand, extension rod, printer, etc.

Measurement principle

During the measurement process, the sensor is moved linearly along the probing path. The probe follows the profile of the probing path and moves up and down. These movements are converted into electrical signals, which are then amplified, filtered, and converted into digital values using an A/D converter. Based on these values, a mathematical representation of the profile is created using a microprocessor. Based on this representation, the Ra and Rz values (or Rq and Rt values) are then calculated according to the relevant standards and displayed on the screen.

Standard delivery scope

Device SRTPro
Standard micro stylus
Roughness standard Ra
Protective cap for switch
Charger
Data cable and software
Operating instructions
Case

Special accessories

Additional test stylus for special applications
Portable Bluetooth Printer
Measuring Stand

Downloads

User Manual SRTPro (PDF)

pdf - 2 MB

DataView Rel. 1.1 (ZIP)

Software

zip - 11 MB

Specifications

Roughness Parameters	Ra, Rz, Rq, Rt, Rc, Rp, Rv, R3z, R3y, Rz(JIS), Rs, Rsk, Rsm, Rmr, Rku, Ry(JIS), Rmax, Rpc, RPc, Rk, Rpk, Rvk, Mr1, Mr2 µm/µinch switchable
Measuring Range	Ra, Rq: 0,005 - 32 µm Rz, R3z: 0,02 - 64 µm Ry, Rt, Rp, Rv: 0,02 - 320 µm Rs, Rsm: 1.000 µm Rsk, Rmr: 100 %
Resolution	0.001 μm / 0.04 µinch
Accuracy	≤ 10%
Measurement Repeatability	≤ 6%
Cut-off Wavelength	0.25 mm / 0.8 mm / 2.5 mm / Auto
Traversing Length Ln	1 - 5 cut-off (selectable)
Traversing Speed	0.25 mm - 0.135 mm/s 0.8 mm - 0.5 mm/s 2.25mm - 1 mm/s
Digital Filter	RC, PC-RC, GAUSS, D-P
Probe/Stylus	Standard Model TS-100, inductive, diamond tip 5µm radius, 90° angle
Probe Measuring Range	± 20µm / ± 40µm / ± 80µm
Language	Menu: English, German
Display	128 x 64 OLED Dot Matrix Display
Power Supply	Built-in 3.7V Li-Ion battery, charger AC220V/DC5V, 800mA / 3 hours, operating time 20 hours
Environment	-20°C - +40ºC, ≤ 90% rel. air humidity
Standard	ISO, DIN, ANSI, JIS
Dimensions (L x W x H)	141 x 55 x 40 mm (device without probe)
Weight	400g

All SaluTron^® gauges correspond to national (DIN) and international (ISO, BS, ASTM) norms and possess the CE-sign.
Specifications are subject to change without prior notice.

	KS100 – Sensor for small holes, suitable for flat and inclined surfaces as well as conical workpieces; measures in holes with a diameter greater than 5 mm and a depth less than 15 mm.
	KS110 - Sensor for curved surfaces, suitable for convex or concave surfaces with a radius of curvature of 3 mm or more.
	KS120 – Sensor for very small holes, suitable for holes with a diameter > 2 mm and a depth < 9 mm.
	KS130 – Groove sensor, measures in grooves with a width greater than 3 mm and a depth less than 3.2 mm; the distance from the stylus tip to the front edge is 3 mm.
	KS131 – Deep groove sensor, usable in grooves with a width of more than 3 mm and a depth of less than 10 mm; measures steps with a height of less than 10 mm.
	KS131P – 7 mm groove & curved sensor, suitable for grooves with a width greater than 1.5 mm and a depth less than 7 mm and for measuring steps under 10 mm in height.
	KS132 – 13 mm groove & curved sensor, suitable for grooves with a width > 2 mm and a depth < 13 mm and measures steps of less than 15 mm.
	KS133 – 13 mm narrow groove sensor for grooves with a width greater than 1.2 mm and a depth less than 13 mm; also measures steps of less than 15 mm.
	KS135 – 23 mm groove sensor for grooves with a width > 2 mm and a depth < 23 mm; measures steps smaller than 25 mm.
	KS160 – Axe-type sensor (axial sensor), for measurements in grooves with a width of more than 3 mm and a depth of less than 3.2 mm. The distance from the stylus tip to the front edge is 1.6 mm. Measurement on flat surfaces when used in a split-type roughness tester.
	KS55 – Extension rod, extends the sensor length by 50 mm. Maximum 3 pieces.
	KS90 – Angle rod, it changes the direction of the sensor so that it moves transversely, mainly for the surface of certain grooves, e.g., on crankshafts.
	KA520 - Metal substrate work platform, liftable, convenient and stable for the testing process. • Height adjustable: 200±1 mm • Return error: ≤ 1/6 turn of the lifting wheel • Base dimensions: 330 mm × 295 mm × 12 mm • Rotation angle: 80° • Packaging size & weight: 42 × 21 × 15 cm, 5 kg
	Work platform with marble base, incl. V-block • Height adjustable: 300±1 mm • Return error: ≤ 1/6 turn of the lifting wheel • Marble size: 400 mm × 250 mm × 70 mm • Rotation angle: 80° • Packaging size & weight: Column: 54 × 24 × 15 cm, 4.5 kg; Marble plate: 43.5 × 28.5 × 10 cm, 23 kg
	Height gauge for adjusting the height and alignment of a tester. Especially suitable for split-type surface roughness testers. Adjustable maximum height: 300 mm.
	Magnetic stand, arm length: approx. 200 mm including joint. • The column: approx. 200 mm high including base. • Adjustable maximum height: 150 mm. • Rod of the magnet adapter (the part that attaches to the tester): Ø 8 mm.
	Standard roughness calibration block – multi-reticle probe (rectangular shaft) Made of optical glass; high hardness, highly accurate standardized roughness value, scratch-resistant and significantly more durable than metal roughness blocks. Complies with standards GB/T19067.1-2003 and ISO5436-1:2000 Approximate values: Ra = 0.1 μm, 0.2 μm, 0.4 μm, 0.8 μm, 1.6 μm, 3.2 μm, 6.4 μm Custom values and sine waves available on request.
	Roughness calibration block - single engraved lines Complies with GB/T 19067.1-2003 and ISO 5436-1:2000 Approximate value: H 10–20 µm (roughness tester uses filters D–P; the RT value is measured) Custom values available.
	Mini thermal printer Dimensions: 108 × 76 × 46.6 mm External printer, interfaces: USB, Bluetooth. The baud rate will be set before delivery to match connection to the measuring device. Suitable for our roughness, hardness, and thickness gauges. Paper size: width (57.5 ± 0.5) mm, diameter 30 mm.

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Areas of application of roughness testers

Automotive industry
Aerospace industry
Mechanical engineering
Medical technology
Electronics industry